IM having some problems with my setup, one of the problems is that i have a t25 on a mini me and it isnt spooling til around 5,000 rpms, im not joking. another thing is when it does start to boost, it cant, its like it hits some sort of rev limiter or something, but i have 3 good check valves hooked up the the map senser, i just dont know if there hooked up right, and every time i try to boost it throws the map sensor code, but the check engine light doesnt come on. so if you guys could help me by trying to explain this to me about how to route the check valves please help me out i cant stand driving around like this thanks -ben

 

really odd, check for any leaks on the charge pipes, and check your boost gauge for nay leaks too. I'm pretty sure a dinky t-25 should spool by 2-2.5k. You got leaks buddy

 

had same problem-
cause was bad turbo
is it internal wastegated

 

i think i figured out the late spooling problem, but the problem is when it spools it hits some type of rev limiter
How many check valves should there be? Is there any other way of getting around the map sensor??

 

try more check valves....

 

As for the "limiter" as you put it...what is your spark plug gap set at, and what is your timing set at and what does your setup consist of. As for the map code I don't see how you know its throwing a code if the CEL isn't coming on.For the late spool there probably is a boost leak somewhere or you are restricting flow with a bad filter(rag) or something. Elaborate on your setup a little so we know what parts you have.

 

i put my money on the wastegate being busted..

 

I second that! mine would do it right as the vtec start to kick in I ignored it, my stock pistons are scap metal now.